diff --git a/pkgs/by-name/sm/smartgit/package.nix b/pkgs/by-name/sm/smartgit/package.nix
index 6d979ecc6c83..e791f07b37c7 100644
--- a/pkgs/by-name/sm/smartgit/package.nix
+++ b/pkgs/by-name/sm/smartgit/package.nix
@@ -48,9 +48,7 @@ stdenv.mkDerivation (finalAttrs: {
           libXtst
         ]
       } \
-      --prefix JRE_HOME : ${jre} \
-      --prefix JAVA_HOME : ${jre} \
-      --prefix SMARTGITHG_JAVA_HOME : ${jre} \
+      --prefix SMARTGIT_JAVA_HOME : ${jre} \
     )
     # add missing shebang for start script
     sed -i $out/bin/smartgit \